WebP
WebP (Web Picture Format)
A modern image format developed by Google that provides both lossy and lossless compression with significantly smaller file sizes than JPEG and PNG, while also supporting transparency and animation.
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WebP's lossy mode uses VP8 video codec technology with predictive coding and block-based transforms, achieving 25-34% smaller sizes than JPEG at equivalent quality. Lossless WebP uses entropy coding with spatial prediction, producing files 26% smaller than PNG. WebP supports 8-bit alpha channel transparency (both lossy and lossless), animation (replacing GIF at a fraction of the size), and ICC color profiles. Browser support is now universal across Chrome, Firefox, Safari (14+), and Edge. The Canvas API's toBlob('image/webp', quality) enables client-side WebP encoding.
ไพ
```javascript
// Image compression via Canvas
canvas.toBlob(
blob => console.log(`Size: ${(blob.size/1024).toFixed(0)} KB`),
'image/jpeg',
0.8 // quality: 0.0 (smallest) to 1.0 (best)
);
// WebP output (25-34% smaller than JPEG)
canvas.toBlob(cb, 'image/webp', 0.8);
```